Charging roller

Details Charging roller Charging roller

2007-10-16

2007-10-16

Chen, Sophia S. (Department: 2852)

Electrophotography

Image formation

Charging

C361S221000, C399S303000, C399S313000

Reexamination Certificate

active

11224115

ABSTRACT:
A contact charging roller includes a support member and a conductive coating member. The conductive coating member is composed of a seamless tube that contains at least (1) a non-polar resin or a styrene-type thermoplastic elastomer excluding a poly(styrene-hydrogentaged butadiene-styrene) block terpolymer and (2) a polar resin or an elastomer having a polar functional group containing at least nitrogen or oxygen, and contains carbon black in an amount of 10% to 60% by mass with respect to the total mass of the non-polar resin or elastomer and the polar resin or elastomer.

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